The Effects of Progestrone Implants and Serum Gonadotropin Injections on Suffolk Ewe Lambing

Overview

Objectives/Goals The objective of this test is to see if progestrone implants and serum gonadotrone (PG600)injections can play a role in causing an earlier lambing in Suffolk ewes, thus producing heavier lambs for market. Methods/Materials In a herd of twenty Suffolk ewes ten were selected to be implanted with progestrone using pessaries in June of 2001. After fourteen days the pessaries were removed and the ten ewes were injected subcutancously with PG600. The ram was placed with all twenty ewes following injections until all ewes were covered (bred). Weights of all lambs both newborn and again at market time were taken and recorded. Results It was found that out of the ten implanted ewes, three successfully lambed two months earlier than the non-imlpanted ewes. This significantly increased market weight of lambs by an average of sixty-seven pounds. Conclusions/Discussion It can be concluded, that ewes can lamb earlier by using progesterone pessary implants followed by PG600 injections. The significance of this finding is that by producing early lambs, there will be an increase in lamb weight, thus increasing profit.

Competition history

• CSEF 2002 Pharmacology/ Toxicology · Entry S1430

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